Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74bb65f37be2a6d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-18 23:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: df5bf63d8be73caaee99986a2acfd736 SHA-1: faa7b4fb30c6cf7bcbaa1c7b6d39cdb2e6904dcb SHA-256: a74bb65f37be2a6d2ecc0b062360c6315d4ec80dbced9435b6ef66e3637b1b19
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the document's structure suggests it's designed to act as a link farm to distribute traffic to various potentially malicious sites. No scripts were extracted, but the presence of numerous links to disposable hosting and redirector infrastructure is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wb?keyword=delta%2034-670%20table%20saw%20owners%20manual In PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/mikatav-sodikosepulale-lilewezif.pdfIn PDF document text
    • http://copyright-services-us.com/r_gupta_ctet_book_free_downloadguxrw.pdfIn PDF document text
    • https://dugubutufafug.weebly.com/uploads/1/3/0/7/130775350/vukobakiduzabipinag.pdfIn PDF document text
    • http://center-san.ru/diy_cnc_wood_lathe_plansoohxy.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/vararusolajumk57ed.pdfIn PDF document text
    • http://voyazh-shina.com/aavesham_movie_in_telugutbd7w.pdfIn PDF document text
    • http://titanovyi-filtr.ru/educational_psychology_book_in_urduw915l.pdfIn PDF document text
    • http://zalavsky.ru/tifexoszqfn7.pdfIn PDF document text
    • http://duplicwcnj.space/lekerefencq2gq.pdfIn PDF document text
    • http://pshcomonhere.xyz/ruvatowezuzafojjnobt.pdfIn PDF document text
    • http://tryraisins.club/wesexetutesevatobojowyd6hi.pdfIn PDF document text
    • http://hotsales-com.xyz/8872478449728hrz.pdfIn PDF document text
    • http://axecheat5.xyz/mosugafapacb68.pdfIn PDF document text
    • https://mafupalitofix.weebly.com/uploads/1/3/4/0/134042392/pamemebezim-mobawipejopizen-zonafogexurako-kelibituzabege.pdfIn PDF document text
    • http://bioforce-co.site/zapikomusorofosikozxdfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevewodex.epizy.com/the_door_in_the_wall_plot_summary.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/pabodedogu.pdfIn PDF document text
    • http://pexefenebize.epizy.com/86162758182.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5720 bytes
SHA-256: df1e51fe4577af2ea33e81eb035d2859ffd43023d323940da9da7359fab75ad6
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 10328 bytes
SHA-256: 8c4f4fed6fd8026f7e98912e358dc7f1365a931657bbe78362483152e5ed2833

Open this report in the interactive analyzer, or submit your own file for analysis.